Yogi bhajan talks about the three breathing diaphrams and he, as well as many other swamis, seem to believe there is much energy stored in our lowest chakras, especially near the base of the spine. Through my experience I have found much less tension when during a full breath I can expand from my anus up to my head. Yogi bhagan in one of his books talks about the lowest diaphram being near the anus. So with that being said a very powerful practice for me has been this
lie on back and bring feet up by butt so knees will be up in the air and feet flat on the floor. now rock your pelvis, you will feel the base of lower back come up off floor and go back down to the floor. breath in when the lower back arches off the ground and breath out when it comes back to the ground. I do this fairly rapidly so it is almost like a breath of fire exercise, and I do this for a couple minutes then relax for 30 seconds.
when I do the above mentioned exercise I also do this one. sit up straight in your easiest meditation pose. Now putt arms staright out to side, from there bend the elbows to 90 degrees, palms face floor and you hold a fist. NOw when when breath in you have the elbows go behind you and as you breath out the fists come togethor. I do this rapidly as well. Yogi bhajan says this one exercise may possibly change someones whole life, it is a heart opener.
Somedays I only do those two exercises, as they are my favorites, but life is not all about me, it is about you as well
give them a try and if you like them cool, if not at least you gave it a try 
my best to you on your wedding, life is a miracle enjoy everyday
I am love, I am peace, I am joy, I breathe free, I thank the teachers, I am of the one, the same one as you
I am neil and we are us
anyone up for a group hug 